Pump



July 28,1931.. J. w. DES CHAMPS PUMP FiledFeb. 1a.. V1929 2 sheets-sheet2 INVENTOR 3mm/.vw

[9 x EY iaitenieel July 21s, 1931 ummm-a @new 12k-11s Games.,or:wirrmit,@01113.Celelfllieg HIM? y' Application, filed February 1S,.19292; SeiialNvo, 340,795,

Thisuinveritiori reletes-,p;trtic1ila.rly,' tliougli not exclusivelytotlie pumping of deep oil Wllsf v i I Iii thepiiiilips at presentinuse, the. ooliii'nn t.z of oilin the Well Iis lifted zuid flowered .enclisf tenore e,q1ia.ltotlie`.strol;e oftliepump, at eachreeproezttionofthe pump. The lowering of tliel column 'on thedowristroke of tlie pump is :at loss. ofgenergyfor the; equivalent. of` this,

Stroke The objects. of. tliisiinvention are to. yeliminete .tlie.feature otrepeetedly lowering the, of piimpedfliqiiid after eech:active.

195 .saine .column lmust. be.:v lifted on `this 4nextfuplifpiimpingstroke and to ,provide simple, prec-4 til-e211., means I readily.applicable, to p existingTv Hii1i:i} :ii.nc,v.v systems: for,yaccomplishing this desemble result-f Tlieinwfenltiori involves a, numberof speciil,

novell features. of` construction, `coiiibir'iations and relations. .ofparts. .as `li'ereinaifter cle-f scribed .and broadly claimed 'Eliedrawings. accompanying, ande forming part ofthe specificationillustrateoneA prao- Zftical commercial embodiment of tl'ie inveIi-f tion, but itshouldA be understood tligit; tlie strutiiremey be modified Aalsregudstliis partieiilar clisyclosurewitliout. departure from the: tiiiespirit.aiidbrozullscope ofthe invention.l

3o, Figz' l" is ebroken l; find. p art sectional` side elevatioii Qflelengt'liofiwellgtubingcerpyiiig ,thepumptruture findfibove'that theilewe aiitoiriatic' valve fon.supporting and prevent-1 ingltlie'retrolgrzil'e' movement of thec'olrimn j 3?.- Eis.A iS en rxergedbreken Sectional. View f shewingthe Hewholdng Valve es Seated" in its..Operative relation `Fie@ ,3' is a similar, View but showing the newvalvestriietiire as. being rim into. Vthfejtubngv Mid'before seatingtherei 49, in; Figs; 4, fendfere Gross-sectional vViews ofthe structureas'. @substantially thefplanes of-lines L -4, -mi-fofligs. 2land3.

In, the.. illustiifiw,l the.. Working. barrel isA Shown at 7', .theplunger. Operating. thereinv is 4e, indicated' atnditheupperfindlQWenv-aves are shown at Sjend 10 `respecti'vely.I The plunger.reeiprocatedby a valve, rodt 1.1 to.

Wlichsohnetd. 21.11011Shef1" rQdlQ or the sucker.; rodsonlhe... The,Workin@ barrel; is.

when .the .letter isflowerecl ,into the Work barrel' Thevalre 1:0@11however, has' freeslicling movement tlg-1;dirglil this?, plugT oon-(vstr iietio'n', sontliat the letter doesnotinterfefe, WithtlifpumpingnievemelifS-i;

tion .peboyeftlie Working barrel by, special; meziiissliowii inthexillustretionas agset'ofj three dogsZLoperziting in ratdil,guide-Ways sleeve isslilebly mount-eden the rehicedL lower end portion,241 of the .plug @body andi' is. shown Vas lifivngea`tapered(mopeilenolffporition 25H engagingvitliin :i VcorrespoiIdingly..tapered .split wounding rinfe26 Cerryrigleds 8,91. 0r other suitablepacking '2 ii'or"sealin'genfl fain-gemene with the; inner.'y WallI ofthecoller 1.4.:9 VThe bedyfoftlis. redenering iS-'ShQitIx-f esl'levnsfeliinternal! flange l '2.8;' Werk-inf.'- iii @retainer 'simi/@29am thebdyl0f 'thermeso; tligitlrit Willatrgwel with the ypliig but; be; free. foryexpandingv` orgContracting moirek ments., n l y 'liesupporting dogs`21ers 'orcedpoyitf l ofthe. plug? e L lbeeiing, pletes ,32.011

Surreundfngg- Wells O the tubing 3111. the Cellar. 1,4 and, come into,eCfQn. t'. .Suizp'rt-J are forced outwardly by the springs 30 and restupon the shoulder 34, as shown in Fig. 2. When so seated, the expanderring becomes anchored to the collar 14 and hence any further loweringmovement of the plug structure has the effect of forcing vthe packingring down over the taper of the expander and hence expanding the packerinto sealing engagement with the collar. This final movement forexpanding the packer takes place after the pump structure is positioned1n the working barrel and the shoulder 19 on the valve rod enables theplug to be forced. down solidly enough to fully expand the packer andthus seal the valve structure within the supporting collar. The pump maythereafter be operated without disturbing the plug and its valvemechanism. y

The valve rod is suitably sealed where it passes through the plug, themeans for this purpose being shown as the packing 35 surrounding the rodat the lower end of the plug and yieldingly held by washer 36 engaged byspring 37 supported by a gland nut 38, which is secured by a lock nut39. This form of yielding packing will automatically take up the wearresulting from the action of the pump rod.

To prevent the dogs from exerting any thrust on the expander ring whilethe appa-- ratus is being lowered in the tube, the plates 32 at thebacks of the dogs are shown as engaging at the top with the upper walls40 of the cavities 31 when in the retracted rela'N tion shown in Fig. 3.Thus the rubbing thrust of the dogs against the inner wall of the tubingand collar is transferredto the body of the plug rather than to theexpander ring when the plug is being lowered to its seat, but this uppershoulder 40 is cut away at the outside as indicated at 41, so that whenthe dogs spring outward as in Fig. 2, the plug may have the necessaryfurther downward sliding movement to enable the expander ring to sealthe packing against the inside of the collar.

The upper end of the seating cavity 33 in the collar 14 is shown asbevelled as at 42, so as to allow the dogs to emerge gradually as theyreach this cavity and so as to act as an inclined guide to force thedogs inwardly when the plug is to be removed. In this removingoperation, the pump structure will first be lifted in the working barreland the continued lifting movement will then pick up the plug. The firstupward strain on the p ug will break the seal between the packing andcollar and this first movement of the plug breaks the engagement betweenthe packing ring and expander, thereby leaving the packing free tocontract. The further movement causes the stop collar 43 screwed on thelower end of the plug to pick up the expander ring and the dogs, thebevelled shoulder 42 forcing the dogs inward and enabling the structureto be completely withdrawn substantially in the condition illustrated inFig. 3.

lVith the invention installed above the pump, it will be seen that theweight of the column of liquid in the tubing is entirely taken olf theupper pump valve on the lowering stroke of the pump, leaving a partialvacuum or lowering of pressure on the upper pump valve, so that the sameopens more freely to admit the oil or other liquid above the same. Thesupporting valves 15, with their passages 17 about the valve rod aredesigned to pass without obstruction the full pump flow, so that theyoffer no resistance on the lifting stroke of the pump. The pump thusoperates more freely, requires less power and can be worked morerapidly' than with the present arrangements. The apparatus is ofrelatively simple inexpensive construction, sturdy in design and can bereadily applied to existing forms of pumps. lt is lowered through thetubing with the pump and takes its seat automatically in proper relationabove the pump. lllith this invention leakage of the pump valves is notso serious as heretofore, because the liquid lifted by the pump is heldand can not run back through leaking pump valves on the return stroke ofthe pump. The liquid is not chui-ned by a lowering column of liquid ateach downstroke of the pump and because of this same fact, the pumpaction is smooth and even. Thecollar which provides the seat for theplug and valve mechanism is readily connected to the tubing above theworking barrel and does not interfere with the pump operations eventhough the packer and valve mechanism may not be used in conjunctionwith the pump.

lllhat is claimed is:

1. An attachment for oil well pumps, comprising a collar attachable in aline of 'well tubing above the working barrel of a pump, said collarhaving an enlargement and a seat therein, a plug adapted to be loweredthrough the tubing into said collar, a normally retracted support forsaid plug, said support being shiftable into said enlargement and intoengagement with the seat in the collar, packing on the plug, an expanderfor saidl packing operable by said support upon engagement of the latterwith the seat in the collar and upwardly opening valve means carried bysaid plug.

2. An attachment for oil well pumps, comprising a collar attachable in aline of well tubing above the working barrel of a pump, said collarhaving an enlargement and a seat therein, a plug adapted to be loweredthrough the tubing into said collar, a normally retracted support forsaid plug said support being shiftable into said enlarge ment and intoengagement withthe seat inl the collar, packing on the plug, an expanderigmaaie 3. A liquid column supporting attachment for oil well pumps,comprising a plug having a passage for a pump valve rod and valved oilpassages about said rod passage, an expansible packer on said plug, anexpander sleeved on said plug, outwardly thrust sup` porting dogs forthe plug, said dogs having a shitting movement relative to the plug andengageablewith said expander for shitting the latter.

4. A liquid column supporting attachment for oil well pumps, comprisinga plug having a passage for a pump valve rod and valved foil passagesabout said rod passage, an exadapted to be lowered down through a lineof well tubing, said plug structure having a passage for a valve pumprod or the like and an f oil passage provided with an upwardly openingvalve, an expansible packer carried by said plug, a support for theplug, said support adapted for movement relative to `the plug and anexpander for the packer operable by said support in the movement of thesame relative to the plug.

6. A liquid column supporting attachment for oil well pumps, comprisinga plug struc- Jfure adapted to be lowered down through a line of welltubing, said plug having `a passage or a valve pump rod or the like andan oil passage provided with an upwardly opening valve,ran expansiblepacker carried by said plug, a support for the plug, said supportadapted for movement relative to the plug, an expander for the packeroperable by said support in the movement of the same relative to theplug, said support including` an outwardly thrusting dog adapted to beheld in repressed relation by the surrounding walls of the tubing and amember carried by-the tubing chambered to receive said dog and to form aseat for the same.

'7. A liquid column supporting attachment for oil well pumps, comprisinga plug structure adapted to be lowered down through a f line of welltubing, said plug having a' paslsagefor avalve pump rod orIthelikeand'an -oil passageprovided with-an upwardlyfopenging1vvalve,anaex'pansible packer Acarried .by said plug,.asup'port `iforthe plug, ysaid lsup- -port :adapted forl movement fre'lative Ato ','the

fby saidsupport'i1r'the movementzof the same relative to fthe.fpluggvsaid support including `:an outwardly Athru'stingflog adapted tobe *held in :repressed relation by. the surroundfin'gwal-ls offthe'tubing and a imembemcarf- ,ried by the tubingfchamberedf to.receive said dog and :to form afseat -for the same,;,Said chamberedmemberrhaving abevelled face 'to :force backAthef-supporting dogwhen a`,lifting force isyapplieditoztheplug.. v

8. l'n combination with vWellftubing anda valved pumpatthe'lower end otthe same, a `plug carrying a packer ,and insertable through the welltubing into position above the valve mechanism of lthepjump, up'wardlyopening valve means carried'by saidgplugfaz; extensible and yretractable-supporthaving Ia seat in-/the plug, said seat having a shoulderorcarrying upward thrusts of the. support during lowering .movementofthe .plug in Vthe tubing and v'said Yshoulder ,being relieved toenable upward movement of the support when said support is projected, anexpander for the packer operable by the projected support in its upwardmovement relative to the plug and a seating member for the plug, saidseating member being carried by the tubing and chambered and shoulderedto permit the projection of the support and to provide a seat therefor.

9. In combination, a collar attachable in a line of well tubing, saidcollar having an internal seat, a plug structure having a passage and astuffing box for a pump rod and adapted to be lowered on a pump rod downinto position in said collar, expansible packing on said plug, aslidable sleeve on` said plug for expanding said packing, a radiallyshiftable dog seated in the plug and engageable with '-plug,Ian'rexpander lfor the packer operable i" miV . to hold the dog againstpac ring expander movement of the sleeve, while the dog is retracted andto release the dog for packing expander movement when the dog is pro-`jected into the internal seatin the collar, upwardly opening valve meanson the plug structure and a pump rod having a shoulder to drive the plugbody downwardly relative `t o the expander sleeve when the dog is pro-)ected to support thelatter in the collar.

10. In combination, a collar attachable in a line of well tubing, saidcollar having an internal seat, a plug structure having a passage and astuiing box for a pump rod and adapted to be lowered on apump rod downinto position in said collar, expansible packing on said plug, aslidable sleeve on said plu for expanding said packing, a'radally shitable dog seated in the plug and engageable with the sleeve, the seatfor said dog being formed to hold the dog against packing eX- pandermovement of the sleeve, While the dog is retracted and to release thedog for packing expander movement when the dog is proj 5 jected into theinternal seat in the collar, up-

Wardly opening valve means on the plug structure and a pump rod having ashoulder to drive'the plug body downwardly relative to the expandersleeve when the dog is projected to support the latter in the collar,the seat in the collar having an inclined portion for positivelyretracting the dog upon lifting movement of the plug structure.

11. In combination, Well tubing having an internal shoulder, a pumpoperable in said tubing and a plug structure for supporting the columnof liquid above the pump and comprising a plug body having a passage for2o the pump operating rod and an upwardly opening valved passage for theliquid lifted by the pump, an expansible packer carried by the plug bodyand means for expanding said packer including an operating dog en- 25gageable With the shoulder of the Well tubing. In testimony whereof IafliX my signature.

JAMES W. DES CHAMPS.

